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zhannawk [14.2K]
3 years ago
12

Please help! I give brainliest, stars, and hearts!

Chemistry
1 answer:
Bumek [7]3 years ago
6 0

Answer:

B B B B B B B B B B B B B B B B B B B B B B B B

b is not cell theory

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A 0.753 g sample of a monoprotic acid is dissolved in water and titrated with 0.250 M NaOH. What is the molar mass of the acid i
Alexeev081 [22]

Answer:

MM_{acid}=140.1g/mol

Explanation:

Hello,

In this case, since the acid is monoprotic, we can notice a 1:1 molar ratio between, therefore, for the titration at the equivalence point, we have:

n_{acid}=n_{base} \\\\V_{acid}M_{acid}=V_{base}M_{base}\\\\n_{acid}=V_{base}M_{base}

Thus, solving for the moles of the acid, we obtain:

n_{acid}=0.0215L*0.250\frac{mol}{L}=5.375x10^{-3}mol

Then, by using the mass of the acid, we compute its molar mass:

MM_{acid}=\frac{0.753g}{5.375x10^{-5}mol} \\\\MM_{acid}=140.1g/mol

Regards.

7 0
3 years ago
PLEASE HELP ME ANSWER
Delvig [45]

Answer:

570

Explanation:

a centigram is a gram times 100

So you do 5.7 times 10 and you get 570

7 0
3 years ago
Precambrian what did earth look like
Ratling [72]
It was empty , dark , and cold

7 0
3 years ago
A chemical reaction in which an acid and a base react to produce salt and water is called a neutralization reaction. In the neut
Pepsi [2]

Answer:

The answer to your question is Sodium Perchlorate

Explanation:

Data

which is the salt?

Chemical reaction

    Perchloric acid  +  Sodium hydroxide ⇒  Sodium perchlorate + Water

      HClO₄               +       NaOH                =         NaClO₄                 + H₂O

Process

In inorganic chemistry there are two types of salts:

- Binary salts

- Oxysalts

Binary salts are inorganic compounds form by a metal and a nonmetal (only two compounds).

Oxysalts are inorganic compounds form by metal, a nonmetal, and oxygen (three elements).

In the reaction given the only compound that has these characteristics is Sodium perchlorate which is an oxysalt.

4 0
3 years ago
Read 2 more answers
What is the pH of a solution that has [H+] of .0042M?
sveticcg [70]

Answer:

pH = 2.4

Explanation:

pH is defined as the negative log of the hydronium concentration.

Thus, we can plug in the given hydronium concentration:

pH = -log[H⁺] = -log[0.0042] = 2.4 (two significant figures)

The pH of the solution is 2.4.

P.S: Although I referred to [H⁺] as hydronium concentration, it is more accurate to express it as [H₃O⁺], though they are interchangeable and means the same thing.

8 0
3 years ago
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